Valve



(No Model.)

0. 1-]. BROWN. VALVE. No. 587,786. Patented Au 10,1897.

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UNITED STATES PATENT OFFICE.

CHARLES E. BROWN, OF HOME, NEW YORK.

VALVE.

SPECIFICATION forming part of Letters Patent No. 587,786, dated August10, 1897.

Application filed March 11, 1897. Serial No. 627,056. (No model.)

To all whom, it 7121a, concern:

Be it known that I, CHARLES E. BROWN, a citizen of the United States,residing at Rome, in the county of Oneida and State of New York, haveinvented certain new and useful Improvements in Valves; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

Hy invention relates to that class of throttle-valves adapted to beinstantly closed in case of accident to the machinery or other causes,and from various points in the system, either mechanically orelectrically; and my invention consists, first, in the combination, in astop or shut-off valve, of a valve seated against the pressure, a stemconnecting said valve to a piston of greater area, an opening or by-passaround or throughsaid piston, and a vent pipe or valve the'area of whichexceeds the area of the by-pass, whereby the opening of the vent willremovethe pressurefrom one side of the piston and cause the main valveto be closed by the pressure on the piston at a speed proportionate tothe area of by-pass andvent-pipe, and to certain other novel features,all hereinafter described.

In the accompanying drawings, Figure l is a sectional view of a valvewith my improvements applied, showing the valve provided with wings orguides and with the valve opened and with one means of operating thevalve electrically. Fig. 2 is a similar view showing another form ofvalve and with the valve closed, in both of which constructions anordinary hand-wheel and screw being shown for fully or partially closingthe valve. Fig. 3 is a sectional view showing the valve without ahand-wheel, adapted to be used as auxiliary to an ordinary hand-operatedvalve, also shown in said figure.

The casing A, except in the particulars hereinafter stated, is of theordinary globe form, having the inlet B and outlet 0. The casing hasconnected thereto and preferably formed integral therewith a cylindricalportion D, having a suitable cap or cover D, secured by the usual formof flanges and bolts. The valve-seatE is formed in the diaphragm E, andis of the usual or any desired construction.

Mounted on a stem F is a valve G, constructed as shown either in Figs.1, 2, and 3, or otherwise, as shall be found most desirable, to beseated against the pressures, and upon the other endof this stem ismounted a piston H to fit the cylindrical portion D. The piston isprovided with a small by-pass, h, hereinafter referredto. A pipe D isconnected to the cap or cover D, and which pipe is provided with avent-cock D the area of outlet exceeding the area of the by-pass, for apurpose hereinafter explained.

Where the device is used as an auxiliary or supplement to an ordinarythrottle-valve and its action controlled entirely by the action of thesteam to open and close the same, the stem extends up beyond the valveand engages a suitable guideway D in the easing, or the arms H may bemade to serve as guides, as shall be foundmost desirable.

\Vhen the device is used with a hand-wheel for wholly or partiallyclosing the valve or releasing the same, a screw-threaded stem I isemployed, passing through a suitable stuffingbox, with the lower end ofthe stem provided with a suitable socket or recess to receive apin 1, ora projecting portion of the valvestem passing through thevalve, and theupper end of the screw-threaded stem is provided with a hand-wheel I ofany usual or desired construction.

By the construction and arrangement of parts it will be seen that assteam is admitted, the vent-cock D being closed, the valve will beraised and the steam will pass through the by-pass and under the pistonand establish an equilibrium, allowing the free passage of steam, or thevalve acting against the pressure of the steam is opened thereby, and anequal pressure being exerted on both sides of the piston said pistonperforms no function; but should a break occur in the machinery or fromany cause it should become desirable to out off the steam instantly byopening the vent-pipegvhich is of larger area than the by-pass, thepressure will come on the side of the piston adjacent to the valve, andas said piston is of larger area than the main valve and the pressure isagainst both piston and valve the greater area will overcome the lesserand the piston will pull the valve against the seat closed, and uponagain closing the cock of the vent the equilibrium Will be restored andthe valve again open to action of the steam.

The pipe D may extend to different points in the system and be providedwith a series of vent-cocks, the opening of any one of which will causethe same action. A wire may also be employed connected to the vent-cockand extend to different points, and by pulling on the same open thevent, or the same may be controlled electrically by a pair ofelectromagnets or helices, with the armature connected to the cock ofthe vent and a series of split circuits and push-buttons located atvarions points in the system.

A whistle or other signaling device may be connected with the valve, sothat when the vent-cock is actuated to cut off the steamsupply an alarmwill be sounded. I

Various modifications in the means of controlling the vent-cock or themeans of opening or closing the main valve. by hand may be made, as willbe readily understood.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. Avalve for controlling the passage of the medium from the source ofsupply seated against the pressure, a piston of greater area connectedto the valve, an opening or by-pass around or through said piston, and avent pipe or valve the area of which exceeds the area of the by-pass,said valve being held open by pressure while the vent is closed orautomatically closed when thevent is opened, substantially as described.

2. The combination in a valve, a valve seated against the pressure, apiston of greater area connected thereto, a by-pass' around or throughsaid piston and a vent in combination With means disconnected from theValve for regulating or cutting off the flow substantially as described,whereby While permitting the valve to be automatically opened and closedby pressure to be fully or partially out on by hand for the purpose setforth.

8. In a stop or shut-01f valve a valve-disk, a piston of greater areaconnected thereto, a. by-pass around or through said piston, a vent pipeor valve, and means for engaging the valve but disconnected therefromfor fullyor partially closing the valve by hand, substantially as setforth.

4. In a stop or shut-off valve a casing provided with the valve-seat, avalve-stem having a valve near one end and a piston at the other, a holeor by-pass in said piston, a cylindrical portion in which said pistonmoves closed at its outer end, a stop-cock connecting with thecylindrical portion, a screw-threaded stem to engage the end of thevalve-stem but disconnected therefrom, and a hand-Wheel, substantiallyas described.

' In testimony whereof I affix my signature in presence of twowitnesses.

CHAS. E. BROWN.

= l Vitnesses:

. JOHN S. BAKER, J. H. HELMER.

